'Principal' in the Bible

“Teacher, which is the greatest commandment in the Law?”

This is the first and greatest commandment.

Jesus answered, “The first and most important one is: ‘Hear, O Israel, the Lord our God is one Lord;

and you shall love the Lord your God with all your heart, and with all your soul (life), and with all your mind (thought, understanding), and with all your strength.’

And [there in Jerusalem] the chief priests and the leading men of the Jews brought charges against Paul [before Festus], and they repeatedly pleaded with him,